Visititation
Hampshire shows the following Gwm as son rather than great-grandson of
the above Knerick but describes him as Gwm ap Madock ap David ap Knerick.
It is therefore unclear whether or not the above 2 generations existed.

A

Gwm

i

William

a

Sir
John Williams of Thame and Berfeld or Burfield or Burghfield

BE1883
starts with Sir John and suggests that he descended "from a common progenitor
with the Sir Robert sic Williams, Knt.,
who assumed the name Cromwell, and was ancestor of the Protector." It is
not clear how such may be.